package day02demo;

public class Demo1 {
    public static void main(String[] args) {
        int a  = 5;
        int c = a++;
        System.out.println(c++);
        byte b = 4;
        //b = b + 4;//byte, short ,char计算时转为int;
        b += 4;//  b = (byte)(b + 4)

    }
}
